Bulldog Collar‑Lok Trailer Coupler 2" Ball 5,000 lbs 3‑1/2" Round Tongue w/ High Profile Latch
Model: 028383HEAVY DUTY COUPLER
Designed for utility, horse/livestock, cargo, and construction trailer applications, BULLDOG Collar-Lok™ are the strongest in the industry. The BULLDOG design features the only automatic and continuously tight ball fit in the industry. A variety of coupler styles, tongue mounts, and latches allow configurations to match virtually any trailer. Adjustable couplers assure level operation for trailers when pulled by a variety of different vehicles.
- Easiest to use
- Strong in both static and dynamic loading conditions
- Hinged ball socket for easy hook up
- Clear, visual indication of proper closure
- In compliance with SAE standard J684
| Part Number | 028383 |
| Brand | Bulldog |
| Gross Trailer Weight | 5,000 lbs. |
| Ball Size | 2" |
| SAE Class | III |
| Tongue Outer Diameter | 3-1/2" |
| Overall Length | 16-1/4" |
| Latch | High Profile |
| Tubing | Steel |
| Application | Weld-On |
| Warranty | 5 Year |
| Installation Instructions |  |
About Bulldog
$99 51 $118.75 16% OFF
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Product Details
- Brand: Bulldog
- Model: 028383
- UPC: 086693283838
- Includes: Collar-Lok coupler
Description
HEAVY DUTY COUPLER
Designed for utility, horse/livestock, cargo, and construction trailer applications, BULLDOG Collar-Lok™ are the strongest in the industry. The BULLDOG design features the only automatic and continuously tight ball fit in the industry. A variety of coupler styles, tongue mounts, and latches allow configurations to match virtually any trailer. Adjustable couplers assure level operation for trailers when pulled by a variety of different vehicles.
- Easiest to use
- Strong in both static and dynamic loading conditions
- Hinged ball socket for easy hook up
- Clear, visual indication of proper closure
- In compliance with SAE standard J684
| Part Number | 028383 |
| Brand | Bulldog |
| Gross Trailer Weight | 5,000 lbs. |
| Ball Size | 2" |
| SAE Class | III |
| Tongue Outer Diameter | 3-1/2" |
| Overall Length | 16-1/4" |
| Latch | High Profile |
| Tubing | Steel |
| Application | Weld-On |
| Warranty | 5 Year |
| Installation Instructions | |
About Bulldog
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Bulldog Collar-Lok Trailer Coupler 2" Ball 5,000 lbs 3-1/2" Round Tongue w/ High Profile Latch Install Notes
Installation Instructions for Collar-Lok™ Couplers
Part Numbers:
- Refer to the coupler body for specific part numbers.
Specifications:
- Rated according to SAE J684.
- Minimum tongue overlaps:
- Models 2B, 4B, 5B: 8.5 inches.
- Model 3B: 6.5 inches.
- Other applications: 7 inches.
- Torque specifications:
- Ø 3/8”: 23 ft-lbs.
- Ø 1/2”: 55 ft-lbs.
- Ø 5/8”: 110 ft-lbs.
Tools Required:
- Torque wrench
- Grade 5 bolts with locknuts
- SAE 30 wt. motor oil
- Grease for ball pocket
Step-by-Step Instructions:
Weld-On Installation:
- Ensure all welding is performed by a certified welder.
- Align the coupler's internal stop against the end of the trailer tongue for maximum overlap.
- Weld a 3/16” bead around the coupler and tongue interface. Avoid undercutting or washing out during welding.
Bolt-On Installation:
- Align the coupler internal stop with the trailer tongue's end for maximum overlap.
- Secure the coupler using Grade 5 bolts with locknuts, torqued to the specified values (see Specifications).
- Verify that there is no deformation of the trailer tongue end.
- Confirm the required number and size of fasteners specified by the trailer manufacturer.
Coupling Instructions:
- Block the trailer wheels.
- Align the hitch ball beneath the coupler.
- Open the coupler by removing the pin and sliding the collar away from the ball pocket.
- Lower the trailer onto the hitch ball, ensuring it is fully seated.
- Close the coupler cap, allowing the collar to capture the cap.
- Reinsert the pin behind the collar.
- Secure the safety chains to the towing vehicle as per SAE J684.
Uncoupling Instructions:
- Block the trailer wheels.
- Remove the pin and slide the collar away from the ball pocket to open the coupler.
- Raise the trailer from the hitch ball.
Maintenance Instructions:
- Perform these tasks at least annually:
- Check welds and mounting bolt torque.
- Grease the ball pocket.
- Oil pivot points with SAE 30 wt. motor oil.
- Inspect and replace retaining pins if necessary.
- Keep the ball pocket and mechanism clean to avoid dirt and debris buildup.
Safety Notes:
- Never exceed the maximum rated capacity of the coupler, hitch, or vehicle.
- Always use the correct hitch ball size as indicated on the coupler body.
- Ensure the coupler and ball are properly secured before towing.
- Avoid standing under the coupler or trailer during operation.
- Replace any bent, broken, or worn parts immediately.
- Secure trailer safety chains properly before towing.
Warranty Information:
- Limited Five-Year Warranty: Covers material defects and workmanship under proper installation and use.
- Exclusions:
- Normal wear and tear
- Damage from abuse, misuse, or improper installation
- Alterations not specified by the manufacturer
- For complete warranty instructions, please download the full installation PDF.
Technical Support:
For technical support and assistance, our team of experts is available to help. You can reach our tech support by visiting www.trailerjacks.com or calling 877-869-6690.
Attention: This is a summary of the installation procedure. For complete installation instructions, including diagrams and detailed information from the manufacturer, please download the full installation PDF.
